Trunnion construction



JanQl, 1929.

' 1,697,669 H. E. `TAUTZ TRUNNION CONSTRUCTION Filed Jan. 26. 1928 2 Sheets-Sheet l 0 r! E x'f- -1 TEE U3; s

IIZZIITZIZ' Ggf i N N d` Q Q gf N s Q v l INVENTOR. l BY W vwd A TTORNE YS.

Jan. 1,1929. 56971,@

Y H. E. TAUTZ- TRUNNION' CONSTRUCTIO N Filed Jan. 2e. r1928 Vz Smets-sheet, 2

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INVENTOR. ETaa/z.

' v ATTORNEYS.

Patented Jan. l, 1929;.l

UNITED STATES l p 1,697,669l PATENT oFFIcE.

HERBERT E. TAUTZ, OF MILWAUKEE, WISCONSINASSIGNOR TO THE "DELTA MANU- FACTURING `COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION CONSIN.

' Application filed January 26, 1928. Serial No.-249,720.-

struction for use in connection with saw tables having inA View as one of its'objects the provision ofa simplified trunnion construction wherein a definite fixed relation' may be maintained at all times between a tool element and a tilting table regardless of the angle of inclination which the table may assume. q f f' Other' objects of the invention are; the provision of a trunnion mounting in the form of a casting; the provision of trunnion means for automatically centering the saw blade in the slot Jof a saw table regardless of the angle at which the table is inclined; and generally the provision of a novel and improved form of trunnion construction for the tops of saw tables and the like wherein the top is adapted for tilting in planes inclined to the horizontal.

With these, and such other objects in view as will be apparent from the description, the invention resides in the novel construction, combination and arrangement of parts hereinafter described and claimed and illustrated in the', accompanying drawings, wherein a practical, physical embodiment of the principles of the invention is shown,

Figure 1 is a side elevation of a tilting saw table with the top in tilted position.

Figure 2 is an "end elevation thereof,

partly in section, as from the left OfFigure 1.

Figure 3 is a plan view of the table stan ard with the t le top removed.

Figure v4 is a roup perspective' illus- -trating details of assembly.

`l In practically all details the structure illustratedv comprises a 'conventional table construction wherein as shown in Figures 1 to 4, inclusive, a4 casting lstandard 5 is equi ped with a horizontal base 6, the stan ard being formed at itslupper end'with a bearing 7, and receiving horizontally therethrough the operating shaft 8 of a rotary saw blade 9, the driving power therefor being imparted through a pulley 10 rigidly attached to the4 shaft 8 and bearing against one end of the bushing 7.

Below 'the table to the saw blade 9 is substantially covered y a guard member 11 of the vertically elevating type having vertical osts -12 as a rigld structural unit thereoi adapted `for vertical movement through suitable bushings formed the Aof OF WIS- 'rnUNNroN CONSTRUCTION. l s t upperh'end of the upright 5." Suitable 'clamp- 65 ing means 13, comprising in the present. instance a'set screw, are provided in the upright for engaging the rods'12 to maintain the^guard 411 in the desired vertical adjustment relative to the'supporting standard 5. 60 \A feature of the invention resides in the( bearing construction at the upper end of the guard member 11. -This is best illustrated in Figure 3. The casting comprisingthe guard 11 is formed at each end of itstop 65 with an `outward laterally extending in-I tegral casting 14 of substantially arcuate formation. and having at each side edge relative to the longitudinal length of thel casting, raised portions 15 whichhave bear- 70 ing surfaces formed in the true circum- Jferenceof a circle later to be described.` These bearing castings 14 extend for substantially one half of their area laterally of the-guard casting 11 and over the top of 75 the u right 5 when in assembled position, as best s iown in Figure 2.1 l Seated at th top'of the assembly is the conventional saw table 16 provided with the .usual longitudinally extending slot 17 for receiving the sawblade 9 therethrough and in which the innerA sideiedge of the slot 17 is disposed coincident with' the longitudinal meridian of the'table top. At 'each end of the table top and cooperating'with the bearings 14, the/table top has its `under face formed with integrals castings in the form semicircular trunnions 18, the peripheries of v,which have altrue bearing contact against the bearing faces lo of the trun. nionsupports 14. The periphery of each of the trunnions 18 and the bearing faces 15 of the trunnion supports 14- are disposed y vin the true circumference of a circle'havin'g its axis disposed coincident with the longi- '95 tudinal meridianof the table top and corresponding accordingly with'the inner edge of the slot 17. This lconstruction insures an absolute centering of the rslot 17 relative to the saw blade 9 extending vertically there- `100 though irrespective of the angle of inclination ofthe top 16. This is so by reason of the fact that the fulcrum point of the trunnions lies in the axis of a circle, the circumference of which coincides with the periphery of the trunnions. l

As one means of anchoring the table top 16 at any desired angle to the horizontal,l

provide on .the outer. vertical face of` ,bracket 19 having its long each trunnion 18, a substantially L-shaped arm detachably secured by suitable fastening elements 20 to -the outer face of the trunnion in such posltion that the 'short' arm 21 is inturned under the adjacent support 14. The bracket 19 'is disposed at a right angle to the table top 16 and this position of the bracket is maintained by the provisionof stop lugs-22 forined on the bottom face of the table top out- Wardly of each trunnion -18 to engage opposite edges of the bracket 19, as best shown in Figure-2. A clamping `screw 23 is threaded through the short arm 21 of each bracket19 for clamping engagement against the under face of its adjacent support 14 whereby upon tightening of the clamping screw 23, thc trunnion will be clamped 'against its' seat 14 to bind the table-top inthe desired -anchored positionv relative to the saw' 9. The raised portions 15 at the side 1 edges of the bearings l4 cooperate with the" tabletop 16 to provide stops for limiting the directional movement thereof, the por- ,tion 15 which extends over the upper edge of the standard 5- being elevated relative tothe opposite edge portion 15, as best shown in Figure 2, and defining the horizontal level of the table top. The` lower edgev portion 15 of each ofthe bearings 14 determines, the greatest inclination which the table top mayassume relative to the vertisaid bracket -for cal saw blade 9, contacting with the under face of the table top .for the purpose.

I claim: u 1.1A trunnion construction comprising a supporta casting carried 4by said support and formed with a bearing socket, a movable 'membe r, a semicircularcasting carried by pressure against 'said bearing radially ole thev trunnion.

3. In a tilting table/. top construction, a support, a table top movable for inclination relative thereto, a substantially selnici'rcular l trunnion carried by "sald table top, a bearing,

therefor carried b y said support, a bracket carried by said trunnion and having a portion extending under said bearing, and means carried by saidextendingportion ot' the bracket for clamping engagement against said bearing. y

In testimony whereof I 4aiiir my signature.

" j y HERBERT E. TAU'IZ.

engageniel'it 

